Papers by Keyword: Comfort Level

Abstract: The city’s outdoor wind-heat environment which plays an important role of improving citizen's livelihood has become a focus of research. For the outdoor public space similar to the pedestrian street, pedestrian-height wind and thermal comfort directly influence the value. This paper takes Jiefangbei commercial pedestrian street as an example. Based on the regional climate characteristics in Chongqing, simulation has been carried out by ENVI-met software. Then this paper makes comprehensive evaluation on pedestrian-height wind environment and thermal comfort, and proposes optimization measures according to the existing problems so as to create an outdoor space environment suitable for improving people's way of life in city.

Abstract: This study used recumbent exercise bicycles as the target of investigation and adopted the subjective comfort level assessment results for users after riding to determine the optimal seat position for recumbent exercise bicycles. A total of 16 healthy female participants with heights between 155 and 165 cm were recruited. Participants were required to ride the exercise bicycle at six different seat positions for 1 minute at 65 revolutions per minute (rpm). A 7-point Likert scale was used to conduct the overall comfort-level assessment. The results were as follows: 1) A significant variation in the overall comfort level of the subjects occurred for different seat positions; 2) for women with heights between 155 and 165 cm, the optimal seat position was when the seat center was 629 mm (horizontal distance) from the crankshaft center and 467 mm from the ground surface; and 3) by using regression analysis, the optimal seat position for various heights when riding was derived as follows: seat center position from the crankshaft center (horizontal distance; mm) is equal to 357.729 + 0.687 body height (cm), and seat center position from the ground surface (vertical distance; mm) is equal to 153.018 + 3.005 body height (cm).

Abstract: The bridge vibration problem would be highlighted due to flexibility of bridge when traffic is run on the long-span & high-tower continuous rigid-frame bridge. The finite-element (FE) software of bridge-vehicles coupling vibration theory was utilized to analyze traffic load influence on bridge vibration. It is found that the vehicle accelerations are varied greatly in the middle of mid-span and edge of side-span and vehicle bodies are plunged. According to the evaluating indicator of comfort level, people feel sea-sickness when vehicles run in design speed with fundamental frequency. Due to fundamental frequency of body in different speed, the sea-sickness feel will be stronger with lower speed. The impact action can be decreased by the increase number of vehicle-line load, and it is affected by the distance of vehicle-line load.

Abstract: This paper will provide the basis of summer bra material comfort level design and production. To analyze modal and blending and interweave of other material based on clothing materials, this paper mainly through investing comfort level and wearing experiment in wearing bras of different material in summer, compare the related data of bra comfort level between Modal and other material. It also analyzes the changes of comfort level when modal material blending interweave of other material. And find the conclusion that the modal material is of highest comfort level.

Abstract: When designing the air nailer, in order to achieve the purpose of rapid analysis of design results, use of VB and APDL tools, secondary development of ANSYS, established a parametric CAE analysis module, template-based CAE analysis module, and profession CAE analysis module. And this three module is integrated into the air nail industrial design platform. As a result, designers can quickly and easily on the air nailer for CAE analysis. Meanwhile, in order to achieve in the 3D design of the system of the air nailer’s handle for comfort evaluation, an evaluation method is proposed. Analysis and demonstrated the principle of the method. Established a comfort evaluation model. On this basis, comfortable evaluation software is developed. Evaluation results generated by the software can be used as a reliable basis for revising shapes of handles.

Abstract: Based on requirements of evaluation on comfort level of hand-held tool handles, this essay put forward an evaluation method as well as analyzed and proved its principle, established a corresponding evaluation mode, deliberated index and computation module for comfort level of tool handles. The authored also developed a set of software to evaluate comfort level of tool handles. With this software, one can efficiently evaluate the comfort level of tool handles and an evaluation report will be made automatically, which can serve as a reliable basis for revising shapes of handles.

Abstract: The achievement of energy efficiency in the building sub-sector is considered a very important issue in contemporary research and development efforts by engineers, architects and environmentalists. This is because of its direct impact on national economies and indirectly on the environment and the general well being of future generations. This paper attempts an evaluation of the potentials of passive design in the warm humid zone of Nigeria by assessing the level of energy conservation in building through solar orientation. Model experimental buildings were constructed and comfort factors (indoor and out door temperature, relative humidity, solar radiation, etc) measured, and the climatic and technical (construction) factors determined for each of the model buildings using known methods. Regression model on the effect of solar radiation on the climatic and technical factors reflecting the amount of heat energy required to achieve an acceptable comfort level for each building was formulated. Results from the study show that there is strong evidence of tremendous potentials in passive design as ecotechique for energy conservation in buildings.